Machine for- compressing valve-springs



G O. HILL ANO F. COOPER.

MACHINE FOR COMPHESSING VALVE SPRINGS.

APPLICATION man MAY 4. 1920.

- aww/two@ UNITED s'rarss PATENT OFFICE.

G vCLIIEIIEIORD HILL AND FRANK COOPER, OF SEATTLE, WASHINGTON.

MACHINE FOR- CO'IVIPRESSING VALVE-SPRINGS.

y the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in spring compressing tools and more particularly to a tool for compressing coil springs on valve stems and for assembling and removing said springs from a compressed state above the stems, the main object ofthe present invention being the provision of a tool whereby a coil spring used upon the valve stem of an engine may be quickly and easily placed in a compressed position or removed therefrom.

A further object of the invention is the provision of a tool for compressing coil springs in' ordinary use on gas engines, to a positionv where a' retaining key may be driven into position through the stem to retain the spring in a compressed position and also whereby said coil spring may be again .f

compressed to enable the operator to remove the key when necessary to remove the spring.

This tool is particularly useful for removingthe valves from a particular form of cage used as a valve seat on a particular type ofautomobile when necessary toma-ke repairs on such parts, ras for grinding the valves, etc.. For holding the valves tightly against the seats, a coil spring of ccnsiderable tension i's ordinarily used and much difficulty has been found in compressing the springs to proper form when assembling the parts, or when necessary to remove them and by the use of our improved tool such Y' diiculties can be readily overcome.l

l/Vith the above and other objects in View,

the invention consists in the novel features and construction, the combination and arrangement of parts hereinafter more fully set forth, pointed outv in the claims and shown in the accompanying drawings, in which- Figure l is aside elevation of a spring compressing toolconstructed in accordance with our invention,

Specification of Letters Patent.

Patented Aug. 2, 1921.

VApplication filed May 4, 1920. Serial No. 378,778.

Fig. 2 is a transverse sectional view, taken on the line 2 2 of Fig. 1, and

Fig. 3' is a top plan view taken on the line 3 3 of Fig. 1.

In carrying out our invention, we provide a base plate 1, having projecting up from one end thereof, a pivot post 2, bifurcated at its upper end to 'form spaced ears between which the outer end of a lever 3 is pivoted. The end of this sleeve at 3 being pivotally connected by the ears at the upper end of the post 2 by means of a pin 4t extending transversely through the ears and through the end of the lever. A guide post 5 is mounted upon the base adjacent the forward end thereof and preferably provided with a central bore 6, which extends upwardly within the post at a point substantially midway of the length of the same. The upper end of the post is provided with a transverse slot 7, forming two spaced ears 8v at the upper end of the post. f

The lever 3 has its outer end arranged between the ears 8 of the post 5 and adapted to operate within the slot 7 for reciprocating movement. The lower end of the bore 6 is closed by means of a threaded plug 9, and arranged within the bore and bearing upon the plug 9 is a co-il spring 10. Mounted for Vsliding movement within the bore 6 and slot 7 is a plunger 11, which' normally bearsv against the upper end of the coil spring 10 and is to be disposed between the coil springl() and the lower edge of the lever 3 whereby upon downward movement of the lever 3, the spring 10 will be placed under tension and uponA releasing the lever 3, the

tension of the spring 10 will move the Alever 3 upwardly within the slot 7 to its normal' position illustrated in full lines in Fig. 1.

For the purpose of illustrating the operation of our improved spring compressing device, we have shown in Fig. 1 a valve cage 12, having a valve 13 connected'to a stem 14 upon which is mounted a coil spring 15. This'coil spring 15is normally retained under tension having a transverse p-in 16 inserted through an opening in the stem 14 at a point adjacent the upper end thereof and in order to relieve the pressure of the spring upon the pin 16, a washer 17 is generally arranged between the pin 16 and the upper end of the spring 15. The outer end of the lever 3 is preferably disposed at right angles to the main body of the lever to provide a flat pressing surface and is further bifurcated as shown at 18 to form the two spaced arms 19. When it is desired to compress the spring 15 upon the valve stemv 141, the outer end of the lever 3 is engaged with the washer 17. andV downward movement imparted to the lever 3 which will compress Vthe spring 15, the stem 14: extending upwardly between the arms 19, said spring being compressed sutiiciently to permit of the insertion or the pin 16 within the transverse opening in the stem 4l. The lever 3 is then released and the spring 15 will be securely held in position by means o' the pin 16 and washer 17.

In order to operate the lever 3, a ulcrum lever 2O is employed, the inner end of which is provided with an elongated body portion 21, arranged between the spaced ears 8 at the upper end of the post 5 and pivotally connected thereto by means of the transverse pin 22. It will be noted in Fig. 1 that the fulcrum .lever 20 is disposed inV its normal inoperative position, whereby the end 21 is arranged transversely of the post 5, but when it is desired to actuate the lever 3 and press the same downwardly whereby to compress the spring 15, the lever 2O is swung upwardly away from the lever 3 to the dotted position.

this, it will be apparent that by having a y curved face 23 on the end 21 or' the lever 20,

the movement of the end 21 of the lever 20 will force the lever 3 downwardly. When the member 21 reaches the dotted line position illustrated in Fig. l, the end thereof will be engaged with the upper surface or' the lever 3 and from this, it will be apparent that the lever 3 has been moved downwardly a sufficient distance whereby the spring 15 will have been compressed suciently to permit the pin 16 to be inserted within thev transverse opening in the valve stem 1%. After the pin 16 has been arranged in position, the lever 20 is then returned to its normal position, illustratedin full lines in Fig. 1, the coil spring 10 within the post 5, forcing the lever 3 upwardly to its normal In order to readily actuate the lever Q0, a suitable handle is arranged at the outer end of this lever which, in the present instance, is shown in the shape of a knob indicated by the numeral 24. While we have shown and described the lever 20 as provided with a knob-shaped handle 24, it will be understood that any suitable form of handle may be used with the outer end of this lever which can be readily grasped by the hand of the operator to actuate this lever. 1t will be noted that when the flattened end or face of the cam portion 21 of the lever 20 has asp sumed the position illustrated in dotted lines in Fig 1 g. it will retain such positionuntil or disassembling of the valve parts.

1t will be readily apparent that while we have described the apparatus as especially adapted for placing valve springs in position upon the stems, it will be apparent that it can beused equally'as well for disassembiing the parts and in carrying this out the valve with the compressed spring is positioned beneath the flat face of the lever 3 and the lever is pressed downwardly upon the washer 17 to compress the spring 15 to such a position whereby the key 16 can be readily removed from the valve stem 14 and as the lever 3 is released, the valve may be readily removed and the parts separated as desired for repairs, etc.

What we claim is:

1. A tool of thev class described, including a base plate, a supporting post arranged at one end thereof, a lever pivotally connected to said post and normally disposed in a horizontal position, a guide post carried by the base and embracing said lever, the outer end of said lever being disposed at right angles and provided with spaced'arms and means for reciprocating said leverin the guide post. f

Q. A device `of the class described, including a base, a vlever pivotally connected t0 oneV end thcreor", a recessed plate at the other end ing the lever to its normal position upon release of the first means. v

3. A device of the class described,including a base plate, a pivot post anda guide post, a lever connected to the pivot post and slidably mounted within the guide post, the free end of said'lever proj ecting'beyond the guide post, jaws formed at the outer end of said lever, means for normally retaining said lever in a horizontal position, means supported by the guide post for engagement with'said lever to compress the same withinthe guide post and means for returning said lever to its normal position upon release of the compression means. i v

4:. A tool or' the class described, including a base member, an operating lever pivotally mounted-upon the base, aws formed at one end of said lever, a guide post. for said lever, an operating lever pivotally mounted upon the guide post and having means engaging the first lever for compressing the same within theguide post and means carried by the guide post for-engaging the opposite side ofi-the first llever, to return the same to its normal horizontal position on the release of the operating leven,

5. A; tool of the class described, including abase, a guide post carried by the base and l extending at right angles thereto, apivoted lever embr'acedby said guide post, the outer end of said lever being disposed at right ing at right angles therefrom, a pivoted lever embraced by the guide post and a cam member mounted for rotation between the upper ends Of the guide post and adapted for en- 10 gagement with the lever to compress the same Within the guide post.

7. A tool of the class described, including a base member, a guide post thereon extending at right angles therefrom, a pressing member movable Within the guide post, l5

the outer end of said member being disposed at right angles to its body portion andsprovided With spaced arms and means supported by the guide posts for engagement With said lever to compress the same` Within the guide 20 post and means for returning said lever to its normal position upon release of the compres` sion means.

In testimony whereof We affix our signaf tures. :V

e CLIFFORD HILL; FRANK COOPER. 

